Pregnant Hilary Duff hit a Pilates class in LA on Wednesday and couldn't stop smiling!

The 23-year-old is clearly over-the-moon over her baby news. She announced her pregnancy Sunday, and we love that she's already keeping fit! But, Hilary revealed a craving she's been having:

    "now I can finally talk about my cravings!today it was rice crispy treats!"

So cute!